Abstract
A linear perturbation method is used to demonstrate the effects of temperature and surface orientation on the stability of a nominally flat surface of a two-dimensional elastically stressed crystal. The surface-free energy obtained by using the two-dimensional Ising model [Phys. Rev. B 24, 6274 (1981)] is used in the present analysis. It is found that temperature and surface orientation can significantly affect the critical wavelength for surface roughness.
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